Oxy-fired boiler unit and method of operating the same
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United States of America Patent
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Dec 6, 2016
Grant Date -
Mar 19, 2015
app pub date -
Sep 18, 2013
filing date -
Sep 18, 2013
priority date (Note) -
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Abstract
An oxy-combustion boiler unit is disclosed which includes a furnace for combusting fuel and for emitting flue gas resulting from combustion. The furnace has first, second and third combustion zones, and an air separation unit for separating oxygen gas from air and providing a first portion of the separated oxygen to a first oxidant flow, a second portion to a second oxidant flow, and a third portion of the separated oxygen gas to the first, second, and third zones of the furnace. A controller can cause the separated oxygen gas to be distributed so that the first and second oxygen flows have a desired oxygen content, and so that the first, second, and third zones of the furnace receive a desired amount of oxygen based on a combustion zone stoichiometry control.
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